Draft-gear for passenger equipment.



1. F. ocoNNo... DRAFT GEAR FOR PASSENGER EQUIPMENT.

Patented Apr. 29,1919.

2 SHEETS-SHEET l.

ARPLICATION FILED MAR-23. |911.

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ATTORNEY APPLICATION F-lLED MAR. 23. 1917.

JI. F. OCONNOR.

DRAETL GEAR. FOR PASSENGER EQUIPMENT.

INENTOR. J2ME@ @naar ATTORNEY tra ra .nr orion.

.roms r. o'corrnon, or cnrcao'o, intim-ors, assron'oa 'ro winnen n. or

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To all whom 'it may concern v Be it known that l, JOHN F. OCONNQR, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Draft-Gears for Passenger Equipment, of which the following is a full, clear, concise, and eXact description, reference being had tothe accompanying drawings, forming a: part of this specification.

This invention relates to improvements in draft gears for passenger equipment.

@ne object of the invention is to provide a .draft gear more particularly adapted for passenger cars wherein the arrangement is such that a high capacity frictional resistance is obtained in buff and a spring resistance only in draft.

Another, and more specific object of the invention is to provide a draft gear wherein is obtaineda greater movement in butling than in draft.

ln the drawing forming a part of this specification, Figure 1 is a longitudinal vertical sectional View of a draft rigging showing my improvements in connection therewith. Fig. 2 is a horizontal sectional view taken on the line 2-2 of Fig. 1 and illustrating the position assumed under full bud. 3 and 4lare vertical transverse sectional views taken on the lines 3-3 and 4-1 of Fig. 1, respectively.

lin said drawin 10ml()A denote channelshaped center or raft sills of a car underframe, to the inner faces of which are secured stop castings 11-11 having front stops 12 and rear stops 13. ll/ioti'nted between the sills and cooperating with the stop members is my improved gear, hereinafter described, the gear being connected to the draw bar 111 by a yoke 15, the yoke and draw bar having a pivotal connection, as indicated at 16, and as customary in passenger' car equipment. All the parts are supported by a detachable saddle plate 17. rllhe improved gear, as shown, comprises a casting A having a friction shell orton 18, a sprin casing 19 telescoped wit in the casting friction l elements co erable with' the friction shell, and hereina r described, a front Spring 20, a rear spring21, and transversely eX- tending keys 22-22. The casting A is held rigid or immovable with respect to the stops by means of 'front and rear laterally extend- FOR PASSENGER EQUIPMENT.

Specification of Letters Patent. Egitmd Api?, iig-Btg, application mea nach as, 1917. i semi no. maar?.l

ed shoulders 23-23 that engage the front and rear stops. 'The'friction elements oooperable with the shell 18 may be of any suitable design and, as shown, comprise frictlon shoes 24, wedge 25 and anti-friction rollers 26 interposed therebetween. 'lhe front spring 20, which consists of an outer and an inner coil, bears at its front end against the friction shoes to resist their inward movement with respect to the shell a well known manner. Said spring 20 at its rear end bears against the transversely eiftending keys 22 and the latter are movable in corresponding slots 27-27 provided in the side walls of the casting A near its rear end. '.ll` he normal position of said keys 22 is at the forward ends of said slots 2?' and as illustrated in Fig. 1. The rear spring 21 bears at its front end against the keys 22 at .its4 rear end against thebaekwail the spring casing 19. The casting and casing 19 are provided with coperable engaging annularshoulders 28 to limit the outward movement of the casing relatively to the castin A. A retainer bolt 22 entends through t e wedge 25, between the slices, through the spring 20, and betweenl the keys 22, said bolt having an enlarged at its rear end which bears against faces of the keys 22 to thereby limit forward movement of the retainer boit..

The operation is as follows: bunk rf, the draw bar will bear against the 25 andv thereby force it and the friction shoes inwardly against the combined resista ce the springs 20 and 21, it being ap that the keys 22 float during this met until said keys 22 engage the rear s i shoulders 23 provided on the casting rl., which is held stationary.

During this operation, it is apparent the rear spring 21 is held at its rear end by the casing 19 which is immovable since it is engaged with the casting A.. this rangement, the draw bar is permitted as much movement asy may be desired, and usually v.three inches. 1n "draft, inasmuch as the keys 22 are normally at the front ends of the slots 27 and the casting` A is held 'n movable, it is apparent that the yoke will only actuate the casing 19 and ther-.phy coropress the rear spring 21 only seid keys 22. During the draft action, tikaf-riction elements and front spring 20 remata active. The -draft movement is limited op the yoke engaging the rear end of the casting A, which amount of movement is preferablymade less than the amount of buling movement, ordinarily about one and onehalf inches. 'lo permit the casing 19 to move forwardly with respect'to the casting L the side walls of said casing are slotted,

yas indicated at 31, to slide-over the keys 22.

between the adjacent ends of the springs arranged to prevent transmission of pressure applied to the spring farthest from the friction elements to the other spring when the gear is operated in the opposite direction.

2. ln a draft rigging, the combination with. a stationary friction shell and a spring casing telescoped therewith, of friction elei ments coperable with the shell, a spring within said shell, a spring within said casing,

.and inea-ns preventing outward movement from normal position of the casing relatively to the shell but permitting inward movement relatively thereto.

Leonora with draft. sills and a friction shell immov-V ably mounted therein, of friction elements lcopeiable with said shell at its forward end,

a spring at the rear of said elements, a second spring at the rear 'of the first named spring, both springs being within said shell, acting simultaneously throughoutthe entire stroke to lresist inward movement. of the friction elements under bud, a draw bar, means connected to the draw bar for applying pressure to the rear end of the second named sprin under draft, and means for holding the ront end of said second named spring stationary under .'draft, said means extending within the shell;

d. ln a draft rigging, the combination with draft sills and a friction shell held in fixed relation therewith',` :of a spring casing telescoped within said shell cooperating, means 0n the casing and shell to limit the outward movement o1 the casing,

transversely extending key means exteniiliingp;

through the shell and casing, friction elements eoperable with the friction shell at its 'front end, a spring interposed between said elements and said ,key means, and a sprin interposed, between said key means andft e rear end of said casin 1, said key means being movable under bu and held stationary under draft. 't

ln' witness that ll claim the foregoing f have hereunto subscribed my name this F(th i day'of March 1917.

Joint r. doornen.

at its rear end, 

